how about this:
Intel Core 2 Duo E4300 Allendale 1.8GHz LGA 775 Processor
http://www.newegg.com/Product/Product.asp?item=N82E16819115013R
$104.30
MSI P4M900M2-L LGA 775 VIA P4M900 Micro ATX Intel Motherboard -
http://www.newegg.com/Product/Product.asp?item=N82E16813130093
$48.99
Kingston 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) Dual
http://www.newegg.com/Product/Product.asp?item=N82E16820134046
$64.99
XFX PVT73GUGF3 GeForce 7600GT 256MB GDDR3 PCI Express x16 Video
http://www.newegg.com/Product/Product.asp?item=N82E16814150185
$119.99
Western Digital Caviar SE WD2500JS 250GB 7200 RPM SATA 3.0Gb/s Hard drive
http://www.newegg.com/Product/Product.asp?item=N82E16822144417
$66.99
Sony NEC Optiarc 18X DVD±R DVD Burner With 12X DVD-RAM Write Black
http://www.newegg.com/Product/Product.asp?item=N82E16827152076
$29.99
Thermaltake SOPRANO VB1000BWS Black 0.8 mm SECC Chassis, Plastic Front Door ATX Mid Tower Computer Case - Retail
http://www.newegg.com/Product/Product.asp?item=N82E16811133145
$79.99
Now im pretty sure thats a good build and all compatiable with each other and would be ok for what you want to use it for.
ive missed ot a Psu because i dont know what ones are good lol.
the total of that build so far is
$515.24
so you would have some left for the Psu etc i think